Empyema in rheumatoid lung disease.
D001172:Arthritis, Rheumatoid / Q000150:complications; D004653:Empyema / Q000150:complications*; D006801:Humans; D008171:Lung Diseases / Q000150:complications*; D010996:Pleural Effusion / Q000382:microbiology; D012216:Rheumatic Diseases / Q000150:complications*